1389845405149 has 2 divisors, whose sum is σ = 1389845405150. Its totient is φ = 1389845405148.

The previous prime is 1389845405119. The next prime is 1389845405153. The reversal of 1389845405149 is 9415045489831.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1292302872025 + 97542533124 = 1136795^2 + 312318^2 .

It is an emirp because it is prime and its reverse (9415045489831) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1389845405149 - 2⁹ = 1389845404637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1389845405119) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 694922702574 + 694922702575.

It is an arithmetic number, because the mean of its divisors is an integer number (694922702575).

Almost surely, 2^{1389845405149} is an apocalyptic number.

It is an amenable number.

1389845405149 is a deficient number, since it is larger than the sum of its proper divisors (1).

1389845405149 is an equidigital number, since it uses as much as digits as its factorization.

1389845405149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 24883200, while the sum is 61.

The spelling of 1389845405149 in words is "one trillion, three hundred eighty-nine billion, eight hundred forty-five million, four hundred five thousand, one hundred forty-nine".